The 'Twilight' beauty reportedly can't stand her rumored boyfriend's attitude for always acting like a single man when partying with his pals.Kristen Stewart is reportedly complaining about Robert Pattinson's party behavior. The Bella Swan of "Twilight Saga" film franchise is allegedly disappointed over her rumored boyfriend's attitude for always acting like a single guy while he's in Canada to film his new movie "Cosmopolis".

"Rob's been partying hard," an insider close to the 21-year-old actress revealed. "He's been out almost every night at concerts and dinners with pals - and this is hot on the heels of him going out clubbing with Sienna Miller in London a few weeks ago."

The source also claimed that Kristen has been weeping since knowing that the English heartthrob often acts like he's boring with her. "Kristen's upset about his partying and ended up having a tearful showdown with him over the phone, saying he's acting as if he finds life boring with her," unveiled the source.

Rumor has it, the "On the Road" actress was also upset because she had to take care of their dog Bear all alone while she hasn't seen her boyfriend for weeks. "She's feeling insecure because she's back home looking after their dog Bear and hasn't seen him for weeks," the insider continued. "But Rob thinks she's blowing it all out of proportion."

A few weeks ago, the famous rumored couple was seen spending summer holiday together in Toronto soon after Rob finished the promo tour of "Water for Elephants. However, that didn't last too long because Kristen had to jet away to Los Angeles and London to shoot her new film project, while Rob has to start filming his new movie in Canada.

© Celebrity-Mania.com